chore: import upstream snapshot with attribution

skills/hyperframes-creative/frame-presets/bold-poster/FRAME.md

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+---
+version: alpha
+name: Bold Poster — Frame (video / frame layer)
+description: >
+  Video-first companion to Bold Poster's design.md. The unit is the frame (1920×1080). Atoms are
+  identical and sacred — the four-color palette (white / brown-black ink / tomato red / off-white),
+  the three-face stack (Shrikhand display tilted at poster scale, Libre Baskerville serif body,
+  Space Grotesk mono chrome), the stacked text-shadow on red display, the 3px+1.5px double-border
+  grid, red leftbar cards, red em-dash bullets, and the red progress bar. Composition + frame scale
+  rewritten. Motion out of scope.
+unit: the frame — 1920×1080 primary; 9:16 and 1:1 documented
+principle: atoms are sacred · composition is free · numbers come from the script
+
+colors:
+  bg: "#FFFFFF"
+  dark: "#1C1410"
+  red: "#D8000F"
+  light: "#F5F2EF"
+
+typography:
+  # — reading + chrome ramp —
+  body:    { fontFamily: "Libre Baskerville", cqw: 0.85, weight: 400, lineHeight: 1.75, color: "dark" }
+  body-cell:{ fontFamily: "Libre Baskerville", cqw: 0.7, weight: 400, lineHeight: 1.55 }
+  label:   { fontFamily: "Space Grotesk", px: 10, weight: 600, tracking: "2px", upper: true, color: "red" }
+  bullet-body:{ fontFamily: "Space Grotesk", cqw: 0.62, weight: 400, lineHeight: 1.45 }
+  # — display / hero ramp (Shrikhand 400, tilted) —
+  card-title:{ fontFamily: "Shrikhand", cqw: 1.9, weight: 400, lineHeight: 1.1, color: "dark" }
+  cell-number:{ fontFamily: "Shrikhand", cqw: 2.7, weight: 400, lineHeight: 1.0, color: "red" }
+  section-header:{ fontFamily: "Shrikhand", cqw: 3.3, weight: 400, lineHeight: 1.0, color: "dark" }
+  red-quote:{ fontFamily: "Shrikhand", cqw: 4.7, weight: 400, lineHeight: 1.15, color: "bg", shadow: "stacked" }
+  hero-title-bottom:{ fontFamily: "Shrikhand", cqw: 10.4, weight: 400, lineHeight: 0.9, color: "dark", rotate: "2deg" }
+  hero-title:{ fontFamily: "Shrikhand", cqw: 11.5, weight: 400, lineHeight: 0.88, color: "dark" }
+  hero-title-red:{ fontFamily: "Shrikhand", cqw: 13.5, weight: 400, lineHeight: 0.85, color: "red", rotate: "-4deg" }
+  close-big:{ fontFamily: "Shrikhand", cqw: 13.5, weight: 400, lineHeight: 0.88, color: "red", rotate: "-5deg" }
+  stat-big:{ fontFamily: "Shrikhand", cqw: 22.0, weight: 400, lineHeight: 0.82, color: "red", rotate: "-6deg" }
+
+spacing:
+  pad-slide: "3cqw 3.6cqw"
+  gap-grid: "1.5cqw 2cqw"
+
+components:
+  progress-bar:
+    backgroundColor: "{colors.red}"
+    size: "0.5cqw tall, bottom edge, width grows with index"
+    description: "The most prominent chrome."
+  hero-title-stack:
+    typography: "{typography.hero-title} + {typography.hero-title-red} + {typography.hero-title-bottom}"
+    transform: "≥4 tilt (−4°/+2°), ≥1 line in {colors.red}"
+    description: "A 3-line Shrikhand composition — the signature opener."
+  stat-big:
+    typography: "{typography.stat-big}"
+    color: "{colors.red} (or {colors.bg} on red with stacked shadow)"
+    transform: "rotate(-6deg)"
+    description: "Hero numeral at poster scale."
+  fin-grid:
+    border: "0.3cqw solid {colors.dark} outer"
+    rule: "0.15cqw solid {colors.dark} inner (touching at intersections)"
+    rounded: "0"
+    typography: "{typography.cell-number} ({colors.red}) + {typography.label} + {typography.body-cell}"
+    description: "The double-border tabular signature."
+  red-leftbar-card:
+    borderLeft: "4px solid {colors.red}"
+    padding: "0 0 0 ~1cqw"
+    rounded: "0"
+    shadow: "none"
+    typography: "{typography.card-title} + {typography.body} + red em-dash bullets"
+    description: "Editorial card cantilevered off a red left rule — no outline."
+  red-panel:
+    backgroundColor: "{colors.red}"
+    textColor: "{colors.bg}"
+    description: "Full-bleed statement surface; display carries the stacked text-shadow."
+  dark-panel:
+    backgroundColor: "{colors.dark}"
+    textColor: "{colors.bg}"
+    description: "Full-bleed dark statement surface; red accents."
+  stacked-text-shadow:
+    shadow: "2px 2px 0 rgba(28,20,16,.25), 4px 4px 0 rgba(28,20,16,.2), 6px 6px 0 rgba(28,20,16,.15)"
+    appliesTo: "red display text on red panels only"
+    description: "The ONLY shadow in the system — text-shadow, not box-shadow."
+  bullet:
+    marker: "red em-dash (—) or round (•) glyph at absolute-left"
+    color: "{colors.red}"
+    description: "No default disc bullets; capped at three."
+---
+
+# Bold Poster — Frame (video / frame layer)
+
+## Overview
+
+Bold Poster at frame scale is a **populist editorial poster** — vintage Italian sports-magazine
+display, classical serif body, one saturated tomato red, grids ruled in ink. Every frame should
+feel _printed_: heavy display type at poster scale, locked to one red accent, on a white/off-white
+sheet (or a full red/dark statement panel), with decoration kept to a strict minimum.
+
+The voice is a three-face stack: **Shrikhand** (heavy slab-script, weight 400 only, routinely
+tilted −6°..+2°) carries every hero title, section header, stat, and card title; **Libre
+Baskerville** (literary serif) carries every body paragraph — it's what makes the system feel
+printed; **Space Grotesk** (uppercase, 2–3px tracked) is chrome only — labels, eyebrows, counters,
+bullet bodies. The plane is flat; the _only_ shadow is the stacked text-shadow on red display.
+
+**Key characteristics at frame scale:**
+
+- **Four colors only** — white / brown-black ink / tomato red / off-white. Red is the lone accent.
+- **Shrikhand display, tilted** (−6° stat, −5° close, −4° hero-red, +2° hero-bottom) — the signature movement.
+- **Libre Baskerville serif body** (line 1.75); **Space Grotesk** chrome (uppercase tracked).
+- **Double-border grids** (3px outer + 1.5px inner ink); **red leftbar cards**; **red em-dash bullets** (max 3).
+- **Stacked text-shadow** on red display — the only shadow; flat plane otherwise; square corners.
+- **Red progress bar** at the bottom edge of every frame.
+
+## The Frame
+
+### Frame Craft Bar
+
+Three eyeball tests gate every frame before any structural check:
+
+- **Squint** — **one display moment dominates** at 3–6× everything else (the hero stack, `stat-big`, or `close-big`); nothing competes.
+- **Silence** — statement frames reserve **~50–60% negative space**; the **financial grid is the one dense exception**.
+- **Restraint** — **four colors only**, red the lone accent; one display moment per frame; the stacked text-shadow on red is the only shadow; bullets capped at three.
+- **Reference** — aim at a **vintage Italian sports-magazine cover / mid-century European annual report**; failure looks like a **rounded, soft-shadowed multi-accent slide**.
+
+- **Primary:** 1920×1080 (16:9). Display authored in **`cqw`** (`px ÷ 1920 × 100 = cqw`).
+- **Vertical:** 1080×1920 (9:16). **Square:** 1080×1080 (1:1).
+- **Safe area:** `pad-slide` ~3cqw — deliberately tight so the poster type crowds the frame.
+
+**The container law (load-bearing).** Every frame ground sets `container-type: size`; ALL
+frame-relative units are `cqw`/`cqh` against it — never `vw`. Borders stay px; rotation transforms hold.
+
+## Colors
+
+Tokens identical to the source. `{colors.bg}` white is the default ground; `{colors.dark}` is body,
+borders, headers; `{colors.red}` is the only accent — every numeral, section rule, eyebrow,
+leftbar, bullet, progress bar, and the full statement-panel ground. `{colors.light}` off-white
+stripes alternating panels. **No fifth color** (no green/blue/yellow); categorical difference comes
+from position, label, and tilt. Red is never body text, never a tint, never an untexted fill.
+
+## Typography
+
+Two ramps. The **reading/chrome ramp** (Baskerville body 0.85cqw, Space Grotesk labels in px)
+carries copy + chrome; the **display ramp** (Shrikhand `section-header` 3.3cqw → `stat-big` 22cqw)
+carries every statement and numeral.
+
+- **Legibility floor:** any load-bearing line ≥ **1.4cqw**; mono labels are chrome only.
+- **Fit-to-measure:** size the headline to its length. Cap the block at **≤ 78cqw**; ≤2 words → `stat-big`/`hero-title-red`; 3–4 → `hero-title`; 5+ → `section-header`. The hero is a stacked 3-line composition.
+- **Shrikhand is weight 400, tilted on statement/hero elements, red on numerals**; **Baskerville body at line ≥1.5**; **Space Grotesk chrome uppercase, 2–3px**. Inline `<strong>` switches face to Space Grotesk 600. No italic display, no untilted red hero.
+
+## Depth & Surface
+
+Flat plane. Depth from:
+
+- **Heavy borders** — 3px+1.5px double-border grids, 2px global-card outline, 4px red leftbar rules.
+- **Surface inversion** — full-bleed red or dark statement panels.
+- **Tilt** — rotated Shrikhand breaks the baseline for perceived dimension.
+- **The single shadow** — stacked text-shadow on red display only (text-shadow, three steps).
+
+**Ceiling:** no box-shadow, no rounded surface (square corners; only the hint pill is 4px), no gradient.
+
+## Shapes
+
+- **0 radius everywhere** except the hint pill (4px). Cards, cells, panels, callouts — sharp rectangles.
+
+## Components
+
+- **hero-title-stack** — the 3-line tilted opener. **stat-big** — the poster numeral.
+- **fin-grid** — the double-border tabular signature. **red-leftbar-card** — the cantilevered editorial card.
+- **red-panel / dark-panel** — statement surfaces. **stacked-text-shadow** — the one shadow.
+- **bullet** — red em-dash (max 3). **progress-bar** — the red bottom strip.
+
+## Frame Treatments
+
+> Recipe: ground · register · composes · focal · chrome · accent · silence · Fixed/Free · density.
+> One display moment per frame; statement frames reserve massive negative space.
+
+### 1 · Hero Stack (identity · move: 3-line tilted stack · left)
+
+**Ground** white. **Composes** hero-title-stack, label, body tagline, progress-bar. **Focal** a
+3-line Shrikhand stack (e.g. ink / red-tilted / paper) — one red line, one+ tilted. **Chrome** mono
+eyebrow + Baskerville tagline; bottom progress bar + counter. **Accent** the red line. **Silence**
+right half open. **Fixed** Shrikhand 400, ≥1 tilt + ≥1 red, square. **Free** the words, line sizes.
+**Density** low.
+
+### 2 · Hero Stat (statement · move: poster numeral · red panel · centered)
+
+**Ground** full `{colors.red}`. **Composes** stat-big, label, body sub. **Focal** a `stat-big`
+numeral rotated −6° in white with the stacked shadow, centered, with a mono label above + Baskerville
+sub below. **Accent** the ink stacked-shadow on white. **Silence** ~60%. **Fixed** white-on-red +
+stacked shadow, −6° tilt. **Free** the figure (from script), label. **Density** low.
+
+### 3 · Financial Grid (data · move: double-border matrix · the dense frame)
+
+**Ground** white, `pad-slide`. **Composes** label, section-header, fin-grid. **Focal** a 3px-outer/
+1.5px-inner ink grid of cells (red Shrikhand numeral + mono label + Baskerville body). **Chrome** mono
+eyebrow; progress bar. **Accent** the red numerals. **Silence** tight — the density exception.
+**Fixed** double-border, red numerals, serif body. **Free** figures (from script), labels. **Density** dense-exception.
+
+### 4 · Pull Quote (quote · move: tilted/stacked display · red panel · left)
+
+**Ground** full `{colors.red}`. **Composes** red-quote, Baskerville cite. **Focal** a 2-line Shrikhand
+quote in white with the stacked shadow; a Baskerville cite beneath. **Accent** the stacked shadow.
+**Silence** ~50%. **Fixed** white-on-red + stacked shadow. **Free** quote, cite. **Density** low.
+
+### 5 · Editorial Cards (content · move: red leftbar cards · left)
+
+**Ground** white (or alternating off-white stripes). **Composes** label, section-header, 2–3×
+red-leftbar-card. **Focal** cards cantilevered off 4px red rules — Shrikhand title + Baskerville body
+
+- red em-dash bullets (max 3). **Accent** the red left rules + bullets. **Silence** moderate. **Fixed**
+  4px red leftbar, em-dash bullets, no outline. **Free** card content. **Density** standard.
+
+### 6 · Closing Statement (closer · move: tilted close-big · centered/left)
+
+**Ground** white or `{colors.dark}`. **Composes** close-big, label, body sub, progress-bar. **Focal**
+a Shrikhand `close-big` (rotated −5°, red) sign-off; mono eyebrow + Baskerville contact line. **Accent**
+the red tilted title. **Silence** ~60%. **Fixed** −5° tilt, red close-big. **Free** sign-off, contact.
+**Density** low.
+
+## Composition Rules
+
+### Do
+
+- Stack hero titles in 3 Shrikhand lines — at least one tilted, at least one red.
+- Make every numeral **red Shrikhand**; tilt statement display **−5° to −6°**.
+- Set eyebrows in **Space Grotesk 600 uppercase, 2–3px**, red; body in **Baskerville, line 1.75**.
+- Build data grids with the **3px outer + 1.5px inner double border**; use red leftbar cards elsewhere.
+- Use **red em-dash bullets, capped at three**; apply the stacked text-shadow on red display.
+- One display moment per frame; reserve negative space on statement frames.
+
+### Don't
+
+- No second accent color; no rounded corners (square only, save the hint pill).
+- No drop shadow — the stacked text-shadow on red is the only one.
+- No font substitutes; no Shrikhand body, no Baskerville labels, no Space Grotesk headlines.
+- No default disc bullets; no untilted red statement display.
+- Don't crowd a statement frame; don't blow a long line edge-to-edge (step down).
+
+## Aspect-Ratio Behavior
+
+| Treatment       | 16:9                      | 9:16                     | 1:1                  |
+| --------------- | ------------------------- | ------------------------ | -------------------- |
+| Hero Stack      | stack left, tagline below | stack centered, taller   | stack, tagline below |
+| Hero Stat       | numeral centered          | numeral centered, taller | centered             |
+| Financial Grid  | 3 cells across            | 2 across / stacked       | 2×2                  |
+| Pull Quote      | quote left                | quote stacked            | centered             |
+| Editorial Cards | 2–3 across                | stacked                  | stacked              |
+| Closing         | close-big centered        | close-big stacked        | centered             |
+
+`pad-slide` stays tight on the short edge; re-step display so the line stays ≤78cqw above the floor.
+Tilts hold; the progress bar spans the bottom on every ratio.
+
+## Approved Entities
+
+No real customers, logos, or vendors are defined in the source — render any such mark as a
+placeholder. The system supplies type, one red, and ink rules, not brands.
+
+## Numerals & Claims (hard rule)
+
+Never invent figures, financials, percentages, or dates at frame scale. Render slots as `— figure —`,
+`{metric}`, `+NN%`. Fin-grid cells and stat-big especially carry placeholders until the script
+supplies them. Catalogue numbers / progress are decorative.
+
+## Pre-Render Self-Audit
+
+- **Squint** — one display moment dominates; nothing competes.
+- **Silence** — statement frames reserve ~50–60% negative space; only the fin-grid runs dense.
+- **Color** — four colors only; red is the lone accent; no red body text.
+- **Type** — Shrikhand 400 tilted on statements, red numerals, fit-to-measure; Baskerville body line 1.75; mono chrome uppercase 2–3px; ≥1.4cqw floor.
+- **Depth** — flat; the stacked text-shadow on red display is the only shadow; square corners.
+- **Bullets** — red em-dash, capped at three.
+- **Fabrication** — every numeral traces to the script, else placeholder.
+
+## Known Gaps
+
+- **Motion intentionally out of scope.** frame.md specifies composition only; the source's 550ms slide transitions are deck mechanics.
+- **Shrikhand + Libre Baskerville + Space Grotesk via Google Fonts.** CJK: Noto Serif SC 900/400 + Noto Sans SC; Shrikhand's slab-script has no Hanzi equal — keep tilts + red + double-borders to carry the identity.
+- **9:16 / 1:1 are guidance**; verify the one big line ≤78cqw per ratio and that tilts don't clip.
+- Grids, leftbar cards, and the stacked shadow are CSS-only; no external imagery is required.

skills/hyperframes-creative/frame-presets/bold-poster/caption-skin.html

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+<!--
+  Bold Poster — caption skin (preset-local source).
+
+  This is the preset's own lower-third karaoke caption look. product-launch-video's
+  Step 2 copies it into the project as caption-skin.html; captions.mjs then fills the
+  three reserved holes, wraps the fragment in a <template>, and writes
+  compositions/captions.html:
+    · the empty GROUPS array            → the engine's scene-aware word groups
+    · the 0 duration + 0 width/height   → real total + canvas size
+    · the empty data-brand-tokens style → :root tokens derived from the project's frame.md
+
+  Token contract — reference ONLY this fixed vocab (captions.mjs injects it from
+  frame.md, so the Step-2 brand overlay flows through; each var has a bold-poster
+  literal fallback for standalone preview):
+    --cap-ink · --cap-canvas · --cap-accent · --cap-accent-2 · --font-display ·
+    --font-body · --cap-band-top · --cap-band-height
+  Hooks (do not rename): .caption-group / .caption-word + states .is-active / .is-spoken,
+  root data-composition-id="captions", timeline at window.__timelines["captions"].
+  State changes use gsap.set({className}) (applied on the engine's frame-by-frame seek);
+  never tl.call() callbacks (seek does not fire them → wrong state on render).
+
+  Visual: a fresh-paper card with bold poster framing — a heavy 1.5px brown-black ink
+  rule plus a 4px tomato-red leftbar (the brand's cantilevered-card signature), SQUARE
+  corners, NO drop shadow (the system's only shadow is the stacked text-shadow on red
+  display). Serif body face, ink glyphs. Upcoming words sit in faint ink; the current
+  word slams into a tomato-red panel (the brand's signature surface inversion, a hard
+  square block on paper-white reading, no blur) with the stacked text-shadow on it;
+  spoken words settle to solid ink, panel cleared.
+-->
+<script src="https://cdn.jsdelivr.net/npm/gsap@3.14.2/dist/gsap.min.js"></script>
+
+<!-- captions.mjs injects the project's :root tokens here -->
+<style data-brand-tokens></style>
+
+<style>
+  #captions-root {
+    position: absolute;
+    inset: 0;
+    pointer-events: none;
+  }
+  .caption-layer {
+    position: absolute;
+    inset: 0;
+    z-index: 20;
+    pointer-events: none;
+  }
+  /* the keep-out band, from captionBand(H) — frame content stays above it */
+  .caption-stage {
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: var(--cap-band-top, 900px);
+    height: var(--cap-band-height, 180px);
+    display: flex;
+    align-items: center;
+    justify-content: center;
+  }
+  .caption-group {
+    /* every group is absolutely stacked over the SAME band — exactly one shown at a
+       time via opacity. Must be absolute: in-flow groups would lay out side-by-side. */
+    position: absolute;
+    inset: 0;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    opacity: 0;
+  }
+
+  /* THE paper card — heavy 1.5px brown-black ink rule + a 4px tomato-red leftbar
+     (bold poster's cantilevered red-leftbar-card signature), square corners, NO
+     drop shadow (the only shadow in the system is the stacked text-shadow on red) */
+  .caption-pill {
+    max-width: 78%;
+    padding: 20px 44px 24px;
+    background: var(--cap-canvas, #ffffff);
+    border: 1.5px solid var(--cap-ink, #1c1410);
+    border-left: 4px solid var(--cap-accent, #d8000f);
+    border-radius: 0;
+  }
+  .caption-line {
+    display: flex;
+    flex-wrap: wrap;
+    justify-content: center;
+    gap: 0.1em 0.34em;
+    font-family: var(--font-display, "Shrikhand"), Georgia, serif;
+    font-weight: 400;
+    font-size: clamp(40px, 4.4vw, 58px);
+    line-height: 1.16;
+    letter-spacing: -0.01em;
+  }
+
+  /* upcoming — faint brown-black ink, no panel */
+  .caption-word {
+    display: inline-block;
+    padding: 0 0.06em;
+    color: color-mix(in srgb, var(--cap-ink, #1c1410) 42%, var(--cap-canvas, #ffffff));
+  }
+  /* current word — THE tomato-red panel (box-shadow spread = a hard square block
+     w/o layout shift; no blur), paper-white reading on top carrying the stacked
+     text-shadow — bold poster's surface-inversion + only-shadow signatures */
+  .caption-word.is-active {
+    color: var(--cap-canvas, #ffffff);
+    background: var(--cap-accent, #d8000f);
+    box-shadow: 0 0 0 0.06em var(--cap-accent, #d8000f);
+    text-shadow:
+      0.03em 0.03em 0 rgba(28, 20, 16, 0.25),
+      0.06em 0.06em 0 rgba(28, 20, 16, 0.2),
+      0.09em 0.09em 0 rgba(28, 20, 16, 0.15);
+  }
+  /* already spoken — solid brown-black ink, panel cleared */
+  .caption-word.is-spoken {
+    color: var(--cap-ink, #1c1410);
+    background: transparent;
+    box-shadow: none;
+    text-shadow: none;
+  }
+
+  /* optional per-word accents (dormant until a word-classer tags them) */
+  /* brand / key term — Shrikhand display, bold poster's display face inflection */
+  .caption-word.cap-brand {
+    font-family: var(--font-display, "Shrikhand"), Georgia, serif;
+  }
+  /* numerals / data — the mono chrome voice, slightly recessed */
+  .caption-word.cap-num {
+    font-family: var(--font-body, "Libre Baskerville"), ui-monospace, monospace;
+    color: color-mix(in srgb, var(--cap-ink, #1c1410) 72%, var(--cap-canvas, #ffffff));
+  }
+  /* emphasis — a tomato-red em-dash-weight underline (the lone accent) */
+  .caption-word.cap-cta {
+    text-decoration: underline;
+    text-decoration-thickness: 2px;
+    text-decoration-color: var(--cap-accent-2, #f5f2ef);
+    text-underline-offset: 0.1em;
+  }
+
+  @media (max-aspect-ratio: 9/16) {
+    .caption-pill {
+      max-width: 92%;
+    }
+    .caption-line {
+      font-size: clamp(34px, 5.4vw, 48px);
+    }
+  }
+</style>
+
+<div
+  id="captions-root"
+  data-composition-id="captions"
+  data-timeline-locked
+  data-start="0"
+  data-duration="0"
+  data-fps="30"
+  data-width="0"
+  data-height="0"
+>
+  <div class="caption-layer" aria-hidden="true">
+    <div id="caption-stage" class="caption-stage"></div>
+  </div>
+</div>
+
+<script>
+  // captions.mjs injects the engine's scene-aware groups + real duration here.
+  var GROUPS = [];
+  var DURATION = 0;
+
+  (function () {
+    var stage = document.getElementById("caption-stage");
+
+    // build DOM: one .caption-group per group, .caption-word per word
+    GROUPS.forEach(function (group, g) {
+      var groupEl = document.createElement("div");
+      groupEl.className = "caption-group";
+      groupEl.id = "caption-group-" + g;
+      var pill = document.createElement("div");
+      pill.className = "caption-pill";
+      var line = document.createElement("div");
+      line.className = "caption-line";
+      (group.words || []).forEach(function (w, i) {
+        var span = document.createElement("span");
+        span.className = "caption-word";
+        span.id = "caption-word-" + g + "-" + i;
+        span.textContent = String(w.text);
+        line.appendChild(span);
+      });
+      pill.appendChild(line);
+      groupEl.appendChild(pill);
+      stage.appendChild(groupEl);
+    });
+
+    window.__timelines = window.__timelines || {};
+    var tl = gsap.timeline({ paused: true });
+
+    GROUPS.forEach(function (group, g) {
+      var groupEl = document.getElementById("caption-group-" + g);
+      var words = group.words || [];
+      var next = GROUPS[g + 1];
+      var isLast = g === GROUPS.length - 1;
+      var start = Math.max(0, Number(group.start));
+      var end = isLast ? DURATION : Math.min(Number(next.start), Number(group.end) + 0.3);
+      if (end <= start) end = start + 0.01;
+
+      // group on/off — exactly one group visible at a time
+      tl.set(groupEl, { opacity: 1 }, start);
+      tl.set(groupEl, { opacity: 0 }, end);
+
+      // 3-state karaoke via className SETS — seek-safe (gsap.set applies on the
+      // engine's frame-by-frame seek; .call callbacks would NOT fire).
+      words.forEach(function (w, i) {
+        var el = document.getElementById("caption-word-" + g + "-" + i);
+        var at = Math.max(start, Number(w.start));
+        tl.set(el, { className: "caption-word" }, start); // upcoming (also resets on reverse-seek)
+        tl.set(el, { className: "caption-word is-active" }, at); // current
+        tl.fromTo(el, { scale: 0.9 }, { scale: 1, duration: 0.16, ease: "back.out(2.2)" }, at);
+        if (i + 1 < words.length) {
+          var nextAt = Math.max(start, Number(words[i + 1].start));
+          tl.set(el, { className: "caption-word is-spoken" }, nextAt); // demote when next activates
+        }
+      });
+      if (words.length) {
+        var lastEl = document.getElementById("caption-word-" + g + "-" + (words.length - 1));
+        var lastSpoken = Math.min(end, Number(words[words.length - 1].end) + 0.1);
+        tl.set(lastEl, { className: "caption-word is-spoken" }, lastSpoken);
+      }
+    });
+
+    // full-span anchor so the sub-comp timeline spans the whole video
+    tl.to({}, { duration: DURATION }, 0);
+    window.__timelines["captions"] = tl;
+  })();
+</script>